USA’s Aaron Piersol set a new 200 meter backstroke long course world record at the U.S. Nationals yesterday evening, with a time of 1:53.08 where Ryan Locthe’s world record from Beijing 2008 was 1:53.94. Read SwimInfo.com

USA’s Michael Phelps set at new 100 meter butterfly long course world record yesterday evening, with a time of 50.22 where Ian Crocker’s world record from 2005 was 50.40. Read swiminfo.com

Spain’s Aschwin Wildeboer set a new long course 100 backstroke world record today, at the Mediterranean Games in Pescara, with a time of 52.38, where Aaron Piersol’s world record was 52.54. Read SwimNews.com

Italy’s Federica Pellegrini set a new 400 meter freestyle long course world record today, at the Mediterranean Games in Pescara, with a time of 4:00.41 where Joanne Jackson’s world record from march 2009 was 4:00.66. Read SwimInfo.com

Germany’s Daniella Samulski set a new 50 meter backstroke world record yesterday at the German Long Course Nationals, with a time og 27.61 where Sophie Edington’s world record from March 2008 was 27.67. Read The Guardian

Germany’s Britta Steffen has set a new 100 meter freestyle long course world record, at the German national championships and world championship trials in Berlin. Her time was 52.85, where Libby Trickett’s world record from 2008 was 52.88. Read SwimNews.com